I have connected to my broker and downloaded transactions for the last 24 months into 7 subportfolios for each separate account at this brokerage. I had previously downloaded earlier transactions that began 3 years ago into excel and would like to include these earlier transactions with the recent downloaded transactions. I only know how to enter these older transactions manually which is very time consuming because I have about 400 transactions that would need to be entered manually.
Is there a way to import these transactions from a csv files into my existing subportfolios? If so could you please direct me on how to accomplish this.
Thanks.